Dunno why people think Karen Gillan's not a huge draw. She's got a ton of geek cred thanks to Doctor Who, the MCU and Jumanji. You guys have no faith. As for the MIB International comparison, that's not fair. What happened on that movie was the studio butting heads with F. Gary Grey because he wanted to do a "Winter Soldier"-esque darker and more political story for a series that's SUPPOSED to be comedic and action-y and he got pissy the whole rest of production when they told him "no". Grey was 100% the wrong choice for that film and it suffered. That was nothing like this, which hasn't even begun filming yet.
Regardless, Disney needs to give Pirates a rest for a while. The last movie felt very forced in a lot of areas and Carina felt like a Rey wannabe to me (and I like Rey; don't argue with me). And between this and the half-assed Lion King remake, Jeff Nathanson is a hack who clearly wrote it out of distain for Dead Man's Chest and At World's End given how he retconned what Will's responsibilities on the Dutchman were supposed to be and killed off Barbosa again for little to no reason. **** that guy. Either way, I'd rather see Guillermo del Toro's Haunted Mansion movie get made instead. I really don't know why Disney's just sitting on that one!